The Marin/Sonoma Mosquito and Vector Control District and the West Marin Mosquito Council are poised to produce a draft legal agreement that would determine what pesticides the district could use in West Marin to prevent outbreaks. The current agreement—which was signed in 2005 and extended multiple times—expires at the end of June. “Hopefully we’ll be able to reach an agreement,” said Phil Smith, the district’s manager. “Nothing is firm yet or set in stone, but…